Structure A Project For Car Showroom?
May 1, 2010suppose it has following options from which the customer can choose which car he wants to buy
Manufacturer
Model
Mileage
[code]....
which of these should be classified as class.
suppose it has following options from which the customer can choose which car he wants to buy
Manufacturer
Model
Mileage
[code]....
which of these should be classified as class.
Is there any performance hit (or other problem) to creating a lot of class and structure types for a project? I'm not talking about the number of objects existing in-memory during runtime; rather just defining a lot of object types during design time. I find myself making a lot of small classes and structures that are little more than simply packaging a few related variables together.
View 4 RepliesLet's say I roll out version 1 of this project for many users. As time goes by I update the code, change the Access db strucutre here and there, and would like to roll out version 2.What is the best way to do this?Is there an easy way to get the differences between version 1 and version 2 of an access db?
View 6 Replieshow to write the code for my project.I am to base my new project on an existing one(existing one has code that works 100%)and create an Array of a structure that bascially holds the information from a summary form AND the totals from an AddToOrder_Click event. If you are still with me)... I cant figure out what the code is for my structure and Array so that I STILL have a Summary Form but I have an array that shows when I click my PrintPreview. So an Array is basically a "space" that holds information, like my summary form except it doesnt show until I click PrintPreview right?
If I just wanted to show the table then my code belongs in the PrintDocument1_PrintPage to show the array but the actual structure code belongs in the Click_Event of my AddToOrder? Please Please understand I AM NOT asking for anyone to write my code, basically I am asking for some clarification on what exactly creating an array from a structure is and therefore determing where the structure is to be placed in my code..
I am using Visual Studio 2008 Setup project. I need to copy one folder and the sub folders into the program files but when I tried to copy or add the folder to "Application Folder" in File System editor, I am able to add only files and not folders.
View 1 RepliesModule Module1
Public Structure structure1
Public TRANS() As structure2
End Structure
Public Structure structure2
Public X() As Integer
End Structure
End Module
I'm new to VB 2008 after having spent a long time with VB6, so I apologize if this is a stupid question. But I'd really like to have this straightened out.
Let's say I have a pretty large structure that has lots of properties.
Code:
Now say that I want an internal database with about 10 instances of this structure total, describing, say, 10 different products that a store sells. When these values are loaded from a database, they remain totally static. (However, they can be different each time a program loads)
Now say that I have a class. Each instance of this class is a type of that BaseProduct structure. Meaning, each instance of the class pertains to one of the 10 types of products that the store sells. However, this class has additional properties that pertain specifically to each instance, which are not static.
Code:
Now, the problem here is... If I have 200 different transactions, each one contains an instance of BaseProduct. BaseProduct is HUGE, and is largely redundant (only 10 types possible), so I think it's a little silly to include a whole copy of it with EVERY transaction. However, the Transaction class really needs information regarding the base product it pertains to. Is there a way to, instead of declaring a New BaseProduct in the Transaction class, to simply make one of the properties of the Transaction class a pointer to a BaseProduct variable?
In VB6, I would accomplish this by making a BaseProduct(10) array, and then giving each Transaction an ID number referring to an entry in that array. But in VB 2008, using class structure, this is impossible. I can't define the BaseProduct(10) array outside of a class in a namespace, and if I define it in the actual application's form, then the class loses modularity since it relies on the application that's using it.
I am trying to communicate with an external device and i am trying to send a byte array to the external device via sockets but i am always getting a response the message size is too small so i am not sure what i have done wrong. Between the data type there should be no alignment present and all numbers are represented in little endian format. The char array is not null terminated as mentioned in the protocol specifications.
I have to send data based on a struct that embeds 2 other struct. So here's my vb.net code for the struct used to convert to byte array and the sending part.
Public Structure MESSAGETYPE_OIP_Login
Dim Header() As COMMANDHEADER
Dim UserName() As PSTRING
[Code]....
I'm experiencing a problem with the following c-structure:
typedef struct tagTEXTUREPROP
{
DWORD dwSize;
[Code].....
The Marshal.SizeOf obviously calculates a size of 76 and it works with the DLL function, but it leaves me with some bad feelings.
I'm having a problem that's driving me crazy; I can't understand how to convert the XML structure into a class structure (that I want to use to hydrate a XML document).
The XML document looks like this:
xml
<?xml version="1.0" encoding="utf-8"?>
<artists xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/" xmlns="http://www.spotify.com/ns/music/1">
[code]....
I want to make a structure within a structure. Basically it will appear like this:
Structure ID
dim CardType as string
im CardCode as string
[code]......
In Vb.net I am trying to assign an array of structure to another array of same structure[code]...
View 2 RepliesPublic Class ExtendedDateTimePicker Inherits DateTimePicker
View 5 RepliesFor reasons that are beyond my control, I have three Projects. Projects A and B reference project C. Project A references project B so that it can open a large form in project B. I now need to open that large form from project C, but VB won't allow me to add a reference from C to B because that would create a circular dependency. I found a way around it, though. I created a Timer in A, and when I opened C from A, I passed in that timer. When the user performs a certain action, I enable the Timer from A, and this causes C to open B for me.
View 2 RepliesI have a project that I have created, it something like a contact database.It is complete with its own sql server database, and controls and forms.I kinda of understand that I can include this project into another project.This is the tricky part,Can I include my contact project into another project and add more items to the database and forms in a new project?What I'm after is like using classes.My contact database would be like the base class, and the new project would be adding more features to that project.
View 10 RepliesI have two structrures
Public Structure PhoneScheduleEntries
Dim Count As UInteger
Dim PhoneSchedule() As PhoneScheduleEntry
End Structure
i was developing Voice Chat Application in visual Basic .NET 2008 i try a lot methods to make installer for it :
1- i add Project Setup Project for my Project for Visual Studio 2008 Deploy & setup Type Projects and make it with output option and detect dependices
2- i try make it with Setup Factory 8.2.1
3- i try with MSI Factory 2.0
4 i try with Setup Factory 6.0
and after making installer copying it to my test virtual Machine or my friend lap and install it i get this error when try to run my application :
[Code]...
VB 2005 Express Visual BasicI want to move (part of) projects to different projects/ computer.I used File - export template- and was able to save templates of whole project or item(s).They saved nicely in a subdirectory called "templates" as zip files.How do I import to 1/ other project on same pc?2/ To a different computer?I tried copy zip files into corresponding folder on new system. No luck.
View 5 RepliesI made a change to a project and hve induced a major problem. I have warnings and errors now, but I can still debug the project with the "last successful build" Iwould like to just revert everything to that build but I can't find a way to eliminate the problems I induced or find a way to go to a earlier build. Hopefully I can get back to an earlier version or I will loose the entire project as I can no longer get to the designer.
View 5 RepliesIf I put this piece of code in a new fresh vb.net form, add a button and two labels and start debug I get execution time of about 11.5s.If I put the same piece of code in a new form in an old project upgraded from an earlier version of vb.net, start debug I get an execution time of 7.5s.So I do exactly the same in the two projects but get different execution times.
What do I have to do with the fresh new project to get the same execution time ?I am not interested in improving the code to be able to calculate primes faster. I just want to know what is the significant difference between an old upgraded project and a new fresh one. I am using windows 7 64bit on a 2,4 Ghz Intel quadcore.
Public Class Form2
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim l, h, p As Integer
[code]....
I am following the guidelines from [URL]..Mid way through the process they have you rename your App_Code to Old_App_Code folder and compile ... at which point i had DLL's in my BIN folder and i started to repair my aspx/ascx files.
e
Today i find the compiled bin files missing an now all my pages are sqwaking they cannot find the numerous Public Class - Public Shared Function's ... I have verified their build action to Compile but am unable to rebuild an have them regenerate on account of project errors.Advice on how to rebuild the bin or how to properly reference a Public Shared Function? My VB code includes an Imports statement taht used to find the class in app_code.
I'm developing application that is plugable. The plugins are loaded via Assembly.LoadFrom(). In my solution I have 4 projects. A WPF, 2 DLL and another DLL that is a plugin for the app. The plugin project references one of the other DLLs. When I build the Solution and run I was getting an error trying to use the plugin dll because it was expecting an older version of the referenced project. I had to clean and rebuild the plugin project to get it to run correctly.
[Code]...
I am developing a Multi-Project solution (A, B) in Visual Studio 2008.
I need to run a second project from the start up one and then the first project should be closed.
The matter is that I want to Exit the A.exe and kill the process and the dll that are depending on it. And then Run the B.exe.
I am using 8 different vb projects in one solution, beside this I am also using one 3rd party control ion all the projects, while compiling the application it takes around 5 minutes to build the project, While building the application I have observe that it uses lc.exe file which is used for "Reads text files that contain licensing information and produces a .licenses file that can be embedded in a common language run time executable." at this point it takes too much time.
View 1 RepliesI new to this Forum and relatively new to VB programming. I have read some really good posts here and thought I would ask about a perplexing problem I'm having. I createdindows Form application, built it and deployed it with no problems. However, when I added a small block of code, re-built the app and went to add the app to the Project Output Group in the file system editor the project was not in the Project drop down list. I closed the Setup project and deleted it from the project folder and checked my code and re-built the app and tried the Set Up project again with the same result
View 2 RepliesHas anyone else had issues with Visual Basic 2010?My visual basic program has been running fine for months but recently every time I try and load a project (any project) the program freezes, then I have to close it down and reload, every time I load Visual basic for the second time I get the following error:
HTML
An error was encountered while opening associated documents the last time this solution was loaded. Document load is being skipped during this solution load in order to avoid that error.Plus when trying to run a project in debug it takes ages to load (around 5 minutes) this has only started happening recently, projects were loading in seconds.
How do i get multiple icons in a project for use with shortcuts OUTSIDE the project..
View 7 RepliesIs there a way that you can export a file from one project directly into another project?
For example, in one project i have a file called authInvalid.vb and i need to export it into another project?
Having successfully tried out nHibernate, I would now like to try using Fluent for mapping. My main project is in vb.net but I would really like to use c# for the mappings since the lambda expression capability makes it much cleaner. Can you have a separate project/assembly for your mapping files without creating a circular dependency with domain objects?
View 2 RepliesMy problem is with Splash screen I added it to my project but after running that project it displays forever until I clicked on my main forum. please help me how to give a particular time to splash screen i.e., 2 seconds.
View 5 Replies